Issues with battlefield 6 controller setting can't aim target it's slightly off

Hi I'm craig I played battlefield 6 on Xbox series x I'm having a few issues with my controller. I've got settings on legacy and invert as well what settings are good for me as  I can't play it on default cause I can't get used of it. What's the best way to sort this out on? Vehicles? Is on default how do I sort this out? Because it seems like it's off as well? I need someone's help please help me through this. I do have a brain injury and I am struggling with it for a little bit. Can someone help me